Winding-machine.



C. RYDEN.

wmnme MACHINE. I

APPLICATIQN FILED IAN. 30' 1915- I Patented Nov. 7,1916.

I 5 SHEETSSHEET I.

C. RYDEN.

WINDING MACHINE.

APPLICATION FILED JAN-30,1915.

Patented Nov; 7, 1916.

5 SHEETSSHEET 2 Wxmmssa C. RYDEN.

WINDING MACHINE.

APPLICATION FILED mm. 30, 1915.

1,203,790. PatentedNov. 7,1916.

C. RYDEN.

WINDING MACHINE. APPLICATION FILED JAN. '30. 191 5 1-,203.,790. J Patented N0v.7,1916.

5 SHEETSVSHEET 4.

WITN :sszs

C. RYDEN.

WiNDlNG MACHINE.

APPLICATION FILED JAN. 30. I915.

Patented Nov. 7,.1916;

' 5 SHEETS-SHEET 5- p sTATEiS' CLAES RYDEN, OF. CRANSTON, RHODE ISLAND, ASSTGNOR, BY MESNE ASSIGNMENTS,

TO UN IVEBSAL WINDING COMEQANY, OF B OSTON,MASSAGHUSETTS, A CORPORATION or MASSACHUSETTS.

neoa zao- To all whom it may comm Be it known-that I, CLAE-s RYDEN, a citizen of the United States. residing atCran-. ston, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Winding- Machines, of

which the following is a specification. Y

My-invention relates to winding machines for winding electrical coils and particularlyto machines of the type shown and described in United States Patent No. 1,134,268,.

granted to Max Helm April 6, 191 5. I

My present improvement is directed to the traverse-mechanism of the. wlndlngapparatus and its object is to adapt the ma-' chine to wind coils by the improved system set forth in an application for patent for electrical coils and methodv of windmg same filed concurrently herewith. I

In the machine of the application for patent first referred to the traverse-mechanism comprises two reciprocating guides; one, the

wire-guide, for depositing the conductingf material on the coil in concentric layers, and another, the thread-guide, for traversing the yarn or similar insulating-material di.ago-

' faster rate of speed. Through the operation of -this mechanism the wire or other'conducting-material is depo'sitedin, overlying layers of close spirals-while the yarn or. other insulating-material is wound in layers partially separating'the wire layers and arranged with the strands thereof intersecting the turns of the wire in each layerof the coil. In this way the insulating-material is caused to weave through the wire layers, over and underqthe separate turns of the wire. to bind the wire-windings in place andreinforce the whole structure ofthe coil. In winding coils according to th s systexnlt is the preferred practice'to "deposrtthe 111811- latin'g-material with a longer traverseithan. that of the wire so thattheyarn-Wifidirigswill overlap the-ends of the wire layers tobuild up washer-like abutinents'. or closures at'the ends of'the coil. Asset forth in my companion application Serial No. 5,296, filed Jan. 30, 1915, I have nowdevised a novelthe nearlycompleted coil wgund pmmy mm mcnm.

. Specification of'Let'ters Patent.

1 conv Sends ofithe' main traverses, a's-efiected by the camsliown Figs; 3 and-4; Fig. 8 is a.;similar view showing one strand of yarn wound-onto" the core ina slightly difl'erent 'm'anner,,as provided with a, cam of the form rates-tee Nov. areas.

' A plication filed .T'anuary 3Q, 1915 Serial No. 5,297.

build up -more secure and substantial abutments for supporting and protecting the ends of the wire layers. This improved system comprises essentially the winding on of more yarn at the ends of the coil than between theoverlying layers of wire so that a more solid and compact abutment or endclosure is secured and a better reinforcing and insulating medium provided. To carry out this improvement in the method of winding as above described I have devised a means for imparting an additional recip.

rocating movement or series of short tI'fi,V. erses tofthe guide for the insulating-mate- 'rial at each end of its primary or main traverse. That is to say, in my present improved arrangement of the traversing-mechvani sm for the yarnor thread-guide, the latter is given several supplementary short traverses each time it reaches the end of i main traverse, and through this means t e yarn is built up at a faster rate at theends of the coil than between the layers of wirewindings. The manner and means for accomplishing this improvement are fully set forth in the following specification, illustrated by the accompanying drawings, in

which like reference characters designate like parts.

In the drawings: Figure 1 is an elevation 'of a coil-winding machindshowing myimprovements applied thereto; Fig. 2 is an end view of the same, part sectional on the line X-X of Fig. 1,. and illustrating the arrangement of the traverse-guides for the and improved method of disposing the in- I .sulatmg-material at the ends of the coil to wire andyarn; Fig. 3 is a view of one form I of the traverse-cam for reciprocating the yarnor thread-guide of the machine; Fig. 4 is a development of the periphery of said cam. illustrating the peculiar form of its guide-traversing groove; Fig. 5' shows a slightly -modified -form' of traverse-cam;

Fig. 6 is a development of'the groo in the latter; Fig. 7 shows one. strand" of yarn wound on the tube or core 00 toillustrate its hllatlonswith the extra traverses at theshoWnin- Fi'gs. 5 and 6; Fig. 9 isa view hf be driven therefrom by suitable connections; As here shown the spindle b carries a pulley improved machine; and Fig. 10 is a view showing a few layers ofyarn wound on the central, supporting core of the coil without any wire to illustrate one'method of, buildin u the end abutments of yarn-windings.

Tte erring first to Figs. 1 and 2, A designates the main frame of the machine provided at its top with bearings for the rotating winding-spindle b. driven through the medium of a suitable driving-pulley B with which it ispreferably connected by means ofia clutch-device indicated at B, but not here illustrated in detail. The frame A is also constructed with bearings for a cam-shaft 0, arranged below and parallel with the spindle b and adapted to B connected by a belt I) to a pulley B which'latter drives a train of gearing located in the housing A and connected to rotate the cam-shaft 0. These connections being well known and generally used in the winding art are not herein shown or described in detail. v

The cam-shaft o carries two cylindrical cams C and C for reciprocating the two driven independently thereof through sep arate means whereby it can, be rotated at a much slower rate of. speed than that of the cam C. Any suitable arrangement may be em loyed for driving the cam G from the spmdleb independently of the cam ,G, such, for instance, as that described in the application for patent first referred to. As here shown, however, the driving-connections between the spindle b and cam C, are of 'the type illustrated" in my pending application for. Patent, Serial No. 843,794, filed June 8, 1914. They consist essentially of a worm-wheel D secured tothe hub of the camC and adaptedto. be rotated from a fworm' or screw (i on the vertical shaft d. The shaft d is driven'from a train of gearing located in the casing A at the top of the'machine and operated from a gear on the spindle 1), these elements not being here shown in detail as they form no part of the present invention.

The windm'g-spmdle-b projects outwardly beyond the end of the frame A and is adapted to receive a core or tube w' on which the coil W is wound. Arranged on opposite. sides of the projecting end of the'spindle 1), and adapted to be reciprocated longitudi- The spindle b isupper arm 0 G and Gr, see Fig. 2. The guide G for the insulating-material, hereinafter designated as the thread-guide, consists essentially of a hinged arm 9 adapted to slide on a horizontal rod e extending in parallel relation to the spindle b. Preferably, the arm 9 is pivotally mounted on a bushing 9 surrounding the rod 0 and connected to a downwardly-extending arm F. The lower end of the arm F- is adapted to slide in a slot (2? in a rod e arranged below and parallel with the rod 6. The two rods 6, e are supported at one end in a bracket E secured to the end of the main frame A and their opposite ends I are tied together by an arm or brace E,

see Fig. 1. To the outer end of the guidearm 9 are attached forked extensions 9 9 formed with notches through which the insulatin -material or yarn y leads, Preferably, t e lower branch 9* of the fork is curled over at its end to provide a bearingface which is adapted'to rest on the surface on which the winding is being performed. Before leading through the notches at the endsof the forked extensions 9 g the yarn y passes over the edge of a troughlike guide 9 which is mounted on the bushing g. The

tension of the yarn drawing through the notches in the fork g, 9 tends to maintain the end of the guide-arm g normally bearing against the surface of the winding, and as [the coil increases in diameter the arm will swing upwardly on the pivot formed by the ro e. 4 x

The means for reciprocating the guide G from its cam C, as here illustrated, consists essentially of an oscillating lever or rockerarm H pivoted at h on an arm Eflwhich forms an extension of the bracket E. On its lower arm the lever H carries a followerstud or roll it adapted to engage the groove 0 in the peri hery of the cam C while the the lever is formed with. a longitudinal slot. k The depending arm F which-is attached to the thread-guide G is also formed with a. longitudinal slot f and connecting thetwo arms by means of their slots is a horizontal bar or link J. Preferabl .ends of t e link J are made adjustable up the fastening-means j-j at the and down in the slots 71F and f so that the operative length of the rocker-arm H may be varied to alter its reciprocative effect on the guide Gm. In this way the extent of traverse of the guide'may be adjusted in accordance with the required length of the coil to be wound;

' Referring now to the wire-guide G, this has substantially the same arrangement of supporting and reciprocating means as the guide G, and differs therefrom only in structural-details. As illustrated in Fig. 2, two parallel, horizontal rods 70, k are supported I at one end in a bracket K secured to the nally thereof, are. the two traverse-guides main frame A, while their outer ends are-18c traverse.

tied together by a brace, not here shown, but similar to the' arm E. Mounted to slide on the rods 70, k is a vertical arm L, the lower end of which is connected to a hinged guide-arm g. In this case the guide-arm g is adapted to pivot about the axis of the lower rod and its upper end carries the guide proper G. This'consists essentially of a bracket g fo'rmed with bear-.

ings for two peripherally-grooved guidewheels g and g I to lead down wider the pulley g and thence over the guide-wheel g to feed it on to the spindle b. The tension of the wire tends to maintain the guidewheel g in close relation to the surface of the winding and as the coil is built up in layers of increasing diameter the arm g swings back on its pivot k. w o

The wire-guide G is reciprocated from the cam C by means of the rockable lever M, similar in arrangement to the lever H, see Fig. 1, which is oscillated through the engagement of its stud m with the groove of the cam C. Connecting the lever M with the slidable arm L is a link Z, see Fig. 2, arranged in the same manner as the link J and also adjustable in position to vary the operative effect of the lever M.

The above described mechanism is of substantially the same construction and arrangement as that of the machines of the applications previously referred to. The essential novelty of the present improvement resides chiefly in the form and arrangement of the traverse-cam C which reciprocates the thread-guide G; Heretofore, in ma chines of the type specified, it has been the practice to employ'thesame form of cam for both the thread-guide and the wireguide. of single throw to actuate both guides with a constant traverse extending first in one direction and then in the other. The cam for the thread-guide is usually provided with a slightly longer throw than that of the cam for the wire-guide, but bothcams have heretofore been arranged to give a constant extent of traverse and uniform speed of reciprocation to each guide. In my present improvement Inow propose to employ an entirely diflerent form of cam 'for reciprocating the thread-guide G whereby several additional reversals of movement are imparted to the guide at each end of its main traverse, and wherein the speed of reciprocation of the guide is also varied at certain predetermined intervals at the ends of its It is through this means that the thread-guide G is caused to make what might be termed a halting or staggering motion at the ends of its main traverse whereby an increased amount of insulating-material V or yarn is laid on the coil at these points. To accomplish this purpose as above de- The wire w is arranged That is to say, both cams were made scribed I employ a cam of an appropriate form such, for instance, as-that illustrated in either Fig. 3 or Fig. 5. Fig. 3 shows the simplest form of cam adapted for the purpose intended, and Fig. 4 is a development of the cam-groove with which the follower k on the guide-reciprocating arm H en-' gages. Preferably the cam G is of a type comprising a hub 0 and radial spokes '0 c supporting therelatively narrow, circular rim Formed in the periphery of the rim 0 is the slot or groove of for the follower or stud h as shown in development in Fig. 4. Usually the groove 0 extends approximately half way around the circumference of the cam for acomplete traverse remainder of its periphery is taken up by the shorter, supplementary traverses. This will be understood from the following explanation taken in connection with Fig. 4. For instance, starting at the point t, which is the extreme of throw of the groove 0 at one end of the cam, the main traverse of the groove extends at a predetermined pitch or lead to the opposite extreme at t. At this point the traverse of the groove is reversed to lead back in the opposite direction to 25 Thisreversal of the traverse is for a rela-. tively short distance only, however, merely a small fractional'part of the first or main traverse from t to t; and at t the groove 0' again leads back in the opposite direction.

to the point t which is on a line with the point t. That is to say, from t to t and back to t the groove 0' is formed with a short scallop or undulation having. its

straight portions connected by relatively long curves so as to provide for easy passage of the guiding stud or roll around the points of the cam. From the point t the groove extends back in the opposite direction again in its main traverse leading to the point If atthe opposite end of the cam, and at this point the scallop or short traverse is duplicated from ttto t and back to t which isthe starting point of its first, main traverse' In Figs. 5 and 6 have illustrated another type of cam having its groove formed with two extra undulations made by double reversals of the direction of its traverse.

Starting at t in Fig. 6, which is the ex-.

treme pointof reversal of the main traverse at one end of the cam, the groove 0 leads to t at the opposite'extreme of traverse; then reverses for a short distance to 15 and back' again to from 15 it reverses once more to and back to 25 and thence to 17 in its lohg traverse to the opposite end of its throw where the compounding is repeated before starting across from i again in its first, lOIlg traverse. Stated briefly, each of the cams here illustrated has two primary traverses extending in opposite directions with a series of short traverses or undulations interposed between the main traverses. The .action of the cam-grooves in traversing the thread-guide G will be best understood by reference to Figs. 7 and 8 of the drawings which illustrate the central core or tube w of the coil W with one strand of yarnwound thereon in the convolutions which it makes in traversing from one end of the tube to the,

other and back again.

Referring first to Fig. 7 this shows a strand of yarn y,as traversed on the tube a: by the thread-guide G operated from a cam ofthe form illustrated in Figs. 3 and 4. The dash-lines w"-w', 'w w indicate the extent of traverse of the'wire layers inthis form of coil, see also Fig. 10, while the do.

overlap the: ends of the wire layers and Y therefore represents the thickness ,or width of the abutments orclosures of yarn to be built up at the ends of the coil. The course of the yarn in winding from one end of the coil to the other and back again is as folthe opposite end of the tube on. That is to lows: Starting at the point 3 the yarn y is 40 laid at a constant, predetermined pitch from one extreme of traverse y to the opposite extreme 3 From'the point 3 the yarn is shown on the front faceof the tube :12 leading to the point 4, then around on the rear face of the tube to 5, as illustrated by the dottedlines 6; from 5 back around the front face to 7 and thence rearwardly again to 8 which is the limit of itsmaintraverse on the line -y -fI During the time the yarn i-eo is 'inaking these convolutions on the tube as from y to y, the follower-roll or stud 71. On .theguide-reciprocating lever "H will travl" ers'e the cam-grooves, shown'in Fig. 4, from 1t toj't .and the winding spindle b which car P riesthe":tube a: willhavemade one complete rotation and"affraction.,of another turn; between the speedof rotation of v v g ordance' with the length of the y' c'oiibein' nd" or. other conditions, As here show the yarn is wound with approxi-' mately one and oneequarterturns, or what is technically termed a one and-' one quarter I wind for its main traverse from end to" g'spin'dle and the reciprocation of j; rdecan, however, be varied as t end of the coil. The number of the wind best suited-to any particular type of coil is end of its main traverse to bring the yarn 3 -to the point 8 on the tube w, see Fig. 7, the

shorter, supplementary portion of the camtraverse comes into action and the resultant effect on the yarn is as follows: When the guide-actuating stud 72. reaches the point t of the cam-groove 0, shown in Fig. 4, the

traverse of the guide G is reversed and the yarn will now be laid at a less pitch or lead extending back from the point 8 in Fig. 7 to the point 9, which latter is on the line w w at the end of thewire traverse W. That is to say, the cam C now acts to feed the guidev G back from the point 8 in the opposite direction, but instead. of traveling it at the same rate of speed to lay the yarn in a reverse helix having the same pitch .or lead as the first helix extending from 3 the speed of the guide is retarded and the yarn is laid at a more obtuse angle to the axis of the tube m. This is caused by the change in the angle or pitch of the cam-groove '0' between the points 27 and 15 When the guide-operating stud 71/ reaches the point t the guide will be at 9 on the tube as and at this instant'the reversal of throw of the cam causes the guide to traverse the yarn back-again to the point 10 on the tube m. At this point the guide-reciprocating stud it reaches the point-t on the cam C and the traverse of the guide is therefore once more reversed tocarry it toward say, the main traverse of the cam-groove from t to at now comes. into action and the guide G is actuated to; lay the yarn from the point 10, Fig. 7, to 11, thence to 12; from 12 to'13; and from 13 to 14 which ison the line isgiven its supplementary traverse" extending-from 14;. on the line 'y' y' to -15. on the line'w'w' and then back again to 3 .which is the starting point of its main traverse from 3 to y At this point the'traverse of the thread-guide is reversed oncejmore and e the v n is againled across the full. length of th -"'coi l between. the limitsand y4fi and the winding-continues in the same f manner asbefore described. In the meantime the wlre-guide G'is being traversed by the; cam C" at a'constant rat'e'of speed to lay the wire in uniform .layersextending from -'w'-- w' to da e-e0 as shownin Fig. 9, which is aview ofthe coil as nearly completed from the winding started in Fig. 7.

Fig. 10 illustrates a few layers of yarn 13o only wound onto the tube an in accordance with the method just described and shows the effect which this system has in building up the increased amount of yarn at the ends of the layers, In the foregoing explanation no mention has been made of the fact the yarn will make an advance or gain over the preceding turn to eifect' the side-by-side laying of the strands in each layer. In winding wire coils with the present improved system it has been found expedient. to exaggerate'this gain in the lead of the yarn so that instead of laying the turns side-by-side in close relationthey are disposed'at some little distance apart as shown in the central portion of the winding illustrated in Fig. 10. This results in a thinner layer of yarn between thewire layers and also provides a better disposition of the reinforcing strands which pass between the turns ofthe wire. At the ends of the coil, however, the turns of yarn are laid with a,closer wind which is preferable on accountof giving a harder and more solidformation. These last describedfeatures are merely technical details, however, and are 'not' essential to an understanding ofthe princi le of the invention. The main-ob]ect o my improvement is to provide means for disposing more. insulating-material or yarn at the ends ofthe coil thanbetween. the wire layers inorder to build more solidand compact endpoints 17, 18, 19 to 20 which is thelimit of its main traverse. ,At this point the direcabutments.

When the cam shown inFigs. 5" and 6 is employed in place of the one illustrated in Figs. 3 and tits action on the thread-guide- G will have an efiect on the laying of the yarn as follows: Referringflto Fig. 8, theyarn y will be laid from the starting point 16 in a convolution extending through the' tion of movement of the thread-guide is reversed, as the stud h reaches t on the camgroove 0 ,1-shown in Fig. ,6, and the angle of lead of the yarn is also changed due to the change in pitch of the cam-groove.

' the groove 'c from t to t from 21 back to.

From 20 the yarn will be traversed back a short distance to 21, as thestud it moves in 22, as the studh moves from t to 25 from stud moves from tto t from :23 the ya'rnB leads back once more to 24 as the stud follows from t to If; and at this point the stud h commences its long traverse from t tot to carry the guide back to the opposite end of the tubepv. The yarn will therefore .be laid from y to 3 in a'convolution passing through the points 25, 26, 27 to 28 which is in line with its starting point. From 28 the yarn is laid with another series of short traverses leading to 29, and back to. 30, thence back to 31, and once more back to 16,

as efiected by the action of the undulating portion t, 25 t and t of the cam-groove c". It will be noted that "in-Fig. 8 the end traverses of the yarn y areshown as being shorter and of less pitch than those illustrated in Fig. 7. Thereason for this is that .the more traverses there are given to the am at the ends'of the main traverse the aster it.will build up and the more compact the yarn mass will be. Therefore where theyarn is. laid with an increased.

number of short traverses the end abutments may be made thinner without sacri ficing their firmness and stability.

The operation of the complete machine is as follows: Power'is applied to the drivingpulley B to rotate the winding-spindle b,

and the cam-shaft 0 is driven' therefromthrough the medium of the" belt'b connecting the pulleys B and B and operating the train of gearing in the casing A. The shaft 0 rotateslthe cam C and the stud or follower h engaging .with the groove 0 acts to' oscillate the rocker-arm H witl first a long throw, next'a series of shorte oscillations,

then a long stroke again and-s o on. This peculiar, compound movementof the arm H is transmittedto the thread-'g uide'G through the medium of the connecting-link J and sets up a c'ortespondingreciprocating-mo- 'tion consisting of relatively long. traverses in each. direction interrupted by a series of shorter, slower traverses at each end'of the main traverse} The'result of this compound traverse motion-tithe thread-guide G is to lay the yarn iorf'other insulating-material on the tube or core'm in the manner as previously describ'ed; -so that it is built up with a more or less open -,wind throughout the greater portion of the length of the coil being produced, while at the ends of the coil the strands are laid more .closely"together in denser and more compact masses which form'the end abutments or closures. Meanwhile, the wire-guide Grv is being simultaneously reciprocated at a constant rate of speed, with a relatively slow, uniform traverseto'dispose the wire w in close, spiral.

turns as illustrated'in Fig. 9. The wireguide G receives its reciprocation from the rocker-arm which is oscillated by the cam C turning free on the shaft 0. As previ- 22 back again to} 23, see Fig. 8, while the ously. described,the cam C is driven from the train of gearing located in the housing mechanism is usually provided with adjustable means for'regulating the rat1o of speed between the spindle and the wirewinding-spindle. The extent of traverse of both guides can be adjusted through the means previously described so .that coils of various lengths, within certain prescribed limits, can be wound on the machine and the diameter of the coil can also be varied as re quired.

By reference to Figs. 9 and 10 it will be seen that with the method'of winding ,effected through the use of my improved apparatus herein described the windings of insulating-material are caused to build up at a faster'rate at the ends of the coil than in the layers intervening between the overlying turns of the wire, and in this way a better foundation for the wire-windings is provided. While, for the sake of'clearness, I have here shown the yarn as being of approximately. the same size as the wire, usually it is much finer and therefore would not build up as fast as the wire. With my present improvement the yarn can be built up in such a manner that-.it will form projecting shouldersat the ends of the layers as shown at'y in Fig. 10. These shoulders or ledges serve to hold the end turns of wire in place and prevent them'from falling down over the edges of the coil. Furthermore the dense masses of insulating-material at the ends of the coil not only serve to reinforce its structure, but they also act'to prevent short-circuiting of the current between the overlying end turns of the wire Where the electrical potential is generally the greatest.

In most cases where the yarn employed for insulation and reinforcement is very fine, I have found it expedient to wind it withthe short traverses at theends of the coil slightly overlapping within the ends of the wire layers. That is to say, instead of have ing the short traverses of the thread-guide confined toa space outside the limits of the wire layers, theinner end of each short yarn Jthread-guide with a main or primarytraverse is made to fall within the end of the wire traverse so that theyarn will be carried'into the interstices at the ends of the wire layers and be thoroughly compacted into the structure-at these points.

, It is to be observed that the essential feature of my present improved winding ma chine is the means for reciprocating the traverse of maximum length and for interrupting its uniformity of movement at the ends of this main traverse to set, up a series of shorter traverses whereby the guide is actuated with staggering motion at certain intervals of the winding. For accomplishing this effect I have preferred to'herein describe and illustrateone embodiment of my invention in a machine employing a cam of peculiar form. It is obvious, however, that other forms of cams than those here shown could be used for the same purpose and it is also called to attention that other forms of traverse-motions could be employed in place ofthe cam. That is to say, a compound crank-motion might be substituted for the compound'c'am herein described, and

other modifications in the traverse mechanism might suggest themselves to those skilled in the'a-rt. M

Various modifications could also be made 7 in the structure and arrangement of-the otherparts of my improved apparatus without departing from the spirit or scope of the invention.

Therefore, Without limiting myself to the exact embodiment shown and described,

terial, and means to reciprocate said guide with a compound traversing-motion comprising primary traverses of uniform extent and shorter supplementary traverses occurring at either end of the primary traverses and maintained with a definite relation thereto.

2. In a machine for winding electrical c01ls, the' combination with a continuously rotating mandrel on which the conductingmaterial is wound, of an oscillating traverseguide for winding insulating-material diagonally of the windings of conducting material having a main traverse ofconstant length extending between fixed limits and a supplementary traverse of less extent at both I ends of the main traverse whereby the insulating-material is built up at a faster rate at the ends of the coil than between the layers of conducting-material.

3. In a machine for winding electrical coils, the combination with a'continuously rotating mandrel for receiving the turns of wire to be wound thereon, of a traverseguide for winding insulating-material diagonally of the wire-windings, and means to reciprocate the guide with a constant extent of traverse between fixed limits and to also impart to 'the'guide a series of shorter supplementary traverses occurring at the completion of each maintraverse and having a definite relation thereto.

fL-In 'a machine for winding electrical coils, the comblnation with a continuously ana-29o rotating mandrel, of means to wind wire on I said mandrel in a series of superimposed layers, and means to traverse insulating-material diagonally with respect to the wirewindings across the full length of the layers thereof and to impart a series of supplementary traverses to the insulating-material at the ends of the wire layers to build the material up in abutments to reinforce the ends of the coil.

5. In a machine for winding electrical coils, the combination with a continuously rotating mandrel for recelving the layers of wire-windings disposed in closely adjacent turns extending between fixed limits, of a traverse-means for winding insulatingmaterial diagonally of the coils of wire.- windings and acrossvthe full length thereof, and means for operating said traversemeans with a main traverse equal to the length of the wire layers and supplementary shorter traverses arranged outside the limits ofthe main traverse and occurring at regular intervals. at the completion of each main traverse.

6. In a machine for winding electricalcoils, the combination with a' continuously rotating winding-spindle for receiving the wire-windings disposed in layers thereon, of a reciprocating traverse-guide for insulating-material, and means to reciprocate said guide longitudinally of the spindle with first a relatively long traverse, next a series of shorter traverses, then a long traverse in the opposite direction, then a series of short traverses again with the said compound traversing-motion continued progressively throughout the whole operation of the machine and with the long traverse maintained a reciprocating traverse-guide for winding insulating-material simultaneously with the winding ofthe wire, and means to reciprocate the guide'with a compound traversing motion consisting of primary traverses'of uniform extent extending between fixed hunts and supplementary traverses of less extent at the ends of the primary traverses and bearing a constant relation thereto with the shorter traverses made at a slower rate of speed than that of the long traverses.

8. In a machine for winding electrical coils, thecombination with a continuously rotating winding-spindle for receiving the layers of conducting-material to be wound thereon,- of a traverseguide for insulatingmaterialadapted to be traversed longitudinally ofthe spindle, and means to operate said guide with a compound traversing-motion consisting of primary traverses of uniform extent made at a predetermined rate of speed with respect to the speed of rotation of the Winding-spindle, and shorter supplementary traverses at the ends of the primary traverses having a constant relation thereto, said supplementary traverses made with the guide operating at a reduced rate of speed. 1

9. In a machine for winding electrical coils, the combination with a rotating winding-spindle, of means for guiding-conducting-material to dispose it in layers on the spindle, means for guiding insulating-material across the layers of windings of conducting-material, and means to cause a compound reciprocating motion between the spindle and guiding-means for the insulating material to cause the latter to be laid with a main traverse equal to the full extent of the layers of conducting-material and supplementary traverses of shorter length falling outside of the main traverse and serving to build the insulating-material in compact abutments supporting the ends of the coil.

10. In a machine for Winding electrical coils,'the combination with a rotating .winding-spindle, of means to traverse wire longitudinally of the spindle to dispose it in layers of close-wound turns, a guide for insulating-material, and means to traverse said guide across the full extent of the'wire layers and to impart'a supplementary series of traverses thereto at the ends of the main -traverse to cause the insulating-material to be built up in abutments for reinforcing the I ends of the coil.

'11. In a- Winding'machine, the combinetlon with a rotating winding-spindle and a reciprocating traverse-guide, of a compound reciprocating the guide with a primary trav- 'cam having a continuous operating face for erse of predetermined extent interrupted by .a series of shorter supplementary reverse traverses at each end of the-primary traverse. 12. Ina winding machine, the combination with a rotating winding-spindle,'of a reciprocating traverse-guide, a cam formed with acontinuous cam-face formed with throws of maximum and minimum extent,;-' and means to connect the-guide to be reciproc'ated from the cam with a primary traverse-of maximum extent and shorter trav-' 'erses of less extent. I V 13. In a winding machine, the combination with a rotating winding-spindle, of

means for traversing wire longitudinally'of the spindle, a traverse-guide for insulating 1 12 1' material also adapted to be traversed longitudinally of the spindle, an oscillating lever connected with the insulating material guide to traverse the latter, means to adjust the guide connection on the lever to vary the operative efi'ect thereof, and means to oscillatethe lever with a primary movement of maximum extent followed by a series of supplementary oscillations of less extent.

14. In a winding machine, the combination withthe rotating winding-spindle, of a traverse-guide, an oscillating lever for traversing the guide, a cam-follower on the lever, and a compound cam formed with a continuous cam-face w-ith'which the follower engages, said cam-face having primary throws of maximum extent leading in-opposite directions and interrupted by supplementary reverse throws of less extent intervening between and connecting the primary traverses. 1 i

15. In a winding machine, the combination with the rotating winding-spindle, of a traverse-guide adapted to be reciprocated longitudinally of the spindle, and a cam for reciprocating the guide,"said cam having a continuous cam-face formed with primary throws of equal extent extending in opposite directions and supplementary reverse traverses of shorter throw formed by undulations of the cam-face intervening between andconnecting the ends of the primary traverses.

16. In a winding machine, the combina-, tion with the rotating winding-spindle, of a traverse-guide adapted to be traversed longi'tudinally of the spindle, and a cam for reciprocating the guide formed with a follower-groove having portions extending angularly in opposite directions and interthe conducting-material in uniform layers.

of spiral turns, a thread-guide for traversing 5 I rupted by shorter undulatory portions con-' necting the ends of the angular portions of the groove in the manner and for the purpose described. a

a 17. In a winding-machine, the combinamaximum extent extending in opposite dimary traverses. I

20. ,In a winding machine, the combinationwith a rotating winding-spindle, of a plurality of traverse-guides adapted to be traversed axially of the spindle, and means to actuate one of the guides with a longer traverse than that of the other guide and rections and supplementary reverse traverses of less extent intervening between, the priwith its traversing-motion compounded to insulating-material into the coil, and means to traverse the insulating-material-guide' with acompound motion consisting of primary traverses extending the length of the coil and shorter supplementary traverses at both ends of the coil.- I

22.' In a coil-windingmachinegthecombination with a\rotating mandrel for supporting the coil, of a wire-guide for direct ing the conducting-material onto the man'- drel, means to traverse the wire-guide to lay insulating-material diagonally of the wirewindings, and means to opera the thread guide with a compound trav rsing-motion consisting of primary traverses extending.

the length of the wire layers andshorter supplementary traverses'at the ends of the primary traverses acting to-buildupabutw tion with the thread-guide, of a cam for.

traversing the guide, said camformed with helically disposed cam-faces extending in opposite directions, and interrupted by a plurality of shorter undulatory reverse faces connecting the ends of the main helical faces of the cam.

.18. In awinding machine, the. combination with the traverse-guide, of a "cam for traversing-the guide, said cam formed with a guiding-groove on its periphery having compound traverses consisting of helical portions extending; in opposite directions and interrupted by relatively shallow undulations connecting. and: interposed between the helical portions of the groove. 19. Ina winding machine, the combination with a "rotating winding-spindle, of a plurality of traverse-guides adapted to be simultaneously .reciprocated longitudinally of the spindle, and means. to reciprocate one of the guides, with a compound traversingmotion consistingof 'primaiy traverses of ments of insulating-material at the ends-ofthe coil.

ice 4 23. In a machine for,winding coils for 1 electrical purposes, the combination with .a rotating mandrel for supportingthe coil,

of a traverse-guide for the conductingmateriahmeansto traversej said guide to dispose the conducting-material in layers of spiral turns, a traverserguide for insulatingmaterial, and means j to operate the last named guide to traverse" thefinsulatlng- .material, diagonally of the wire-windings and to etfect a series .of short traverses at the ends of; its main traverse to build up a greater mass of insulation at the ends of the v coil than between the-layers.

In testimony whereof I afiix my signature in presence of" two witnesses.

I CLAES RYDEN. Witnesses l ARTHUR A. ARMIivG'roN, HERBERT K. ALLARD. 

